Even after doing some setting for video with the help of online tutorial, the video quality is not good.Quality of video is bit Smoky and Feels more a like video shoot through VGA camera phone... Sample Here.....

I have a 650D and I use that same kit lens all the time. That lens struggles to capture light during darker or nighttime shooting due to f-stop limitations, so to compensate you boosted the ISO which translates to a grainier image.